4-67. AIR COUPLING REPLACEMENT.
This Task Covers:
Cleaning and Inspection
Semitrailer uncoupled from towing vehicle (para
One preformed packing
General mechanic's tool kit
Hold fitting (3) stationary and remove air coupling
Work preformed packing (2) out of air coupling (1).
Discard preformed packing.
CLEANING AND INSPECTION
Clean mud and dirt from all exposed surfaces.
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
The solvent's flash point is 1OOF-138F (38C-59C). If you become dizzy while
using cleaning solvent, immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
Remove grease with dry cleaning solvent and dry thoroughly
Inspect air coupling body for damaged threads or cracks. Replace air coupling if damaged.